Macintosh Classic with horizontal interference

Plasticoat

Well-known member

• Feb 6, 2021

• #2

Hi all,

this has been totally recapped, analogue and logic, but I’m getting what only can be described as interference on screen, both sides.

I expect you’ll tell me it’s a cold joint somewhere, I just cannot narrow it down,

any help would be much appreciated,

thanks

 

Plasticoat

Well-known member

• Feb 7, 2021

• #3

Ok so problem solved, PP1 Phier replaced,

wht da ya know

 

Last edited by a moderator: Feb 7, 2021

C

cheesestraws

Well-known member

• Feb 7, 2021

• #4

Well found!

 

techknight

Well-known member

• Feb 10, 2021

• #5

What is a PPI Phier? 

 

8

8tto

Active member

• Feb 16, 2021

• #6

I think Phier is the brand name on the trim-pot

 

C

Cinan

Well-known member

• Jun 9, 2022

• #6

I have the same problem, what lead you to PP1 ?

 

Plasticoat

Well-known member

• Jun 9, 2022

• #7

Not being sarcastic , the compact Mac forum, I did a search and from what I remember I was kinda pointed in that direction .

you may want to de solder pp1 and apply fresh solder, It cannot hurt, I now replace as I have a small batch at hand so have made it part of the routine